| Nonfullerene organic solar cells have obvious advantages in light absorption,energy levels optimization and price,and become the focus of research in this field.For further research is suitable for the relevant control methods,theory and active layer structure of the Nonfullerene organic solar cells active layer morphology,the thesis is discussed from the perspective of intermolecular interaction.And we can optimize the crystallinity,crystal orientation,phase separation structure and domain size of the blend film by the way of adjusting the solution state,film formation kinetics and post-treatment.Finally,the device performance improved significantly.The DRCN5T/ITIC-TH system organic solar cells constructed an interpenetrating network structure with the thermal annealing treatment.And adding polymer N2200 as nucleating agent,we could adjusted the molecular orientation and phase separation size through heterogeneous nucleation.Finally,the device performance was increased from 0.02% to 4.65%.Using CN as solvent additive and spinning with thermal solution,we changed the solution state and film formation kinetics of BDTT-S-TR/ITIC blend solution,to complete the tasks to balance the crystallization of the donor and acceptor,and build a small size interpenetrating network structure.Finally,the device performance reached 3.59%. |
